The SRD only gives a means to determine costs and weights of weapons for Large and Small versions based on the Medium weapons. Any other supplied values are the author's best determination.

The Boat Oar was originally developed as an opposition of the extra long katana. Characterised by its long wide boat oar shaped design. Little expertise with this weapon is necessary, but it is said that those who master this weapon unlock it's true power. The weapon is naturally slow, much like the kanobo, and the wielder recieves a -2 bonus to all attacks that are made on their own turn, requiring the warrior to watch his opponents moves first and ready himself against his enemies.